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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2010 Advanced Micro Devices, Inc.
* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include <arch/io.h>
#include <usbdebug.h>
#include <device/pci_def.h>
#include "sb700.h"
#define EHCI_EOR (CONFIG_EHCI_BAR + 0x20)
#define DEBUGPORT_MISC_CONTROL (EHCI_EOR + 0x80)
void set_debug_port(unsigned int port)
{
u32 reg32;
/* Write the port number to DEBUGPORT_MISC_CONTROL[31:28]. */
reg32 = read32(DEBUGPORT_MISC_CONTROL);
reg32 &= ~(0xf << 28);
reg32 |= (port << 28);
reg32 |= (1 << 27); /* Enable Debug Port port number remapping. */
write32(DEBUGPORT_MISC_CONTROL, reg32);
}
/*
* Note: The SB700 has two EHCI devices, D18:F2 and D19:F2.
* This code currently only supports the first one, i.e., USB Debug devices
* attached to physical USB ports belonging to the first EHCI device.
*/
void enable_usbdebug(unsigned int port)
{
device_t dev = PCI_DEV(0, 0x12, 2); /* USB EHCI, D18:F2 */
/* Set the EHCI BAR address. */
pci_write_config32(dev, EHCI_BAR_INDEX, CONFIG_EHCI_BAR);
/* Enable access to the EHCI memory space registers. */
pci_write_config8(dev, PCI_COMMAND, PCI_COMMAND_MEMORY);
/*
* Select the requested physical USB port (1-15) as the Debug Port.
* Must be called after the EHCI BAR has been set up (see above).
*/
set_debug_port(port);
}
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